Piston structure of toy gun

ABSTRACT

A piston structure of a toy gun is disclosed. An air induction passage and at least an air inlet are formed on the piston. In addition, a control device is applied to the piston for correspondingly opening or closing the air inlet according to the movement of the piston. As a result, much more air can be sucked into an air storage chamber immediately after the backward movement of the piston. Therefore, the air capacity of the air storage chamber of the cylinder tube can be increased so as to produce larger air pressure for pushing the bullet to the outside of the toy gun, thereby simulating the recoil effect of the real shooting and improving the shooting performance of the toy gun.

FIELD OF THE INVENTION

The present invention relates to a piston structure of a toy gun, andmore particularly to a toy gun with increased air suction area and airsuction speed so as to produce larger air pressure for pushing thebullet away from the toy gun.

BACKGROUND OF THE INVENTION

The conventional toy gun includes a cylinder tube embedded securely in agun body, wherein a rack is mounted on the bottom of the pistonextending to the outside of the cylinder tube for driving the piston bya gear set. The gear set includes a driving gear, a steering gear and afinal gear, wherein the final gear is a semi-gear with an incompletegear ring, whereby the air can be compressed and exhausted bydisengaging a releasing arc edge of the final gear from the rack afterbackward driving the rack and the piston by the final gear.

Due to the fast movement of the piston in the air suction process, theamount of air sucked into the cylinder tube via the gun muzzle isinsufficient. As a result, the shooting performance of the toy gun isreduced.

SUMMARY OF THE INVENTION

It is a main object of the present invention to provide a pistonstructure of a toy gun, wherein an air induction passage and at least anair inlet are formed on the piston for increasing the area of airsuction such that much more outside air can be sucked into the airstorage chamber immediately after the backward movement of the piston.As a result, the air capacity of the cylinder tube can be increased soas to produce larger air pressure for pushing the bullet away from thetoy gun, thereby providing the simulated recoil effect, which simulatesthe real shooting, and improving the shooting performance of the toygun.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional view showing the inside structure of thetoy gun of the present invention.

FIG. 2 is a schematic view showing the motion of the first preferredembodiment.

FIG. 3 is a schematic view showing another motion of the first preferredembodiment of the present invention.

FIG. 4 is a schematic view showing the motion of the second preferredembodiment of the present invention.

FIG. 5 is a schematic view showing another motion of the secondpreferred embodiment of the present invention.

FIG. 6 is a partially enlarged view showing the piston of the secondpreferred embodiment of the present invention.

FIG. 7 is a schematic view showing the motion of the third preferredembodiment of the present invention.

FIG. 8 is a schematic view showing another motion of the third preferredembodiment of the present invention.

FIG. 9 is a partially enlarged view showing the piston of the thirdpreferred embodiment of the present invention.

FIG. 10 is a schematic view showing the motion of the fourth preferredembodiment of the present invention.

FIG. 11 is a schematic view showing another motion of the fourthpreferred embodiment other present invention.

FIG. 12 is a partially enlarged view showing the piston of the fourthpreferred embodiment of the present invention.

FIG. 13 is a schematic view showing the motion of the fifth preferredembodiment of the present invention.

FIG. 14 is a schematic view showing another motion of the fifthpreferred embodiment other present invention.

FIG. 15 is a partially enlarged view showing the piston of the fifthpreferred embodiment of the present invention.

FIG. 16 is a schematic view showing the motion of the sixth preferredembodiment of the present invention.

FIG. 17 is a schematic view showing another motion of the sixthpreferred embodiment other present invention.

FIG. 18 is a partially enlarged view showing the piston of the sixthpreferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, a structure of toy gun is illustrated. A piston 3is slidable in a cylinder tube 2 of a gun body 1. A spring 4 is locatedbetween the bottom of the gun body 1 and the piston 3. A high torquemotor 5 is located in a gun grip. The motor 5 is connected to a finalgear 63, which is partially protrudent into the cylinder tube 2, via asteering gear 61 and a reduction gear 62 of a gear set 6 for beingconnectedly engaged with a rack on the bottom of the piston 3 and fordriving the final gear 63 to pull back the piston 3 until the motor 5 isexactly released from an arc-shaped releasing edge, thereby completingthe process for compressing the air so as to push a bullet outward byusing the compressed air.

In order to improve the shooting performance of the toy gun forsimulating the recoil effect of real shooting, much more air must beaccumulated in the cylinder tube so as to produce larger air pressurefor pushing the bullet away from the toy gun. In order to inhale muchmore air rapidly and improve the efficiency of air suction, the presentinvention is characterized in that an air induction passage and at leastan air inlet are formed on the piston for increasing the air suctionarea, and that a control device is applied to the air inlet forcorrespondingly opening or closing the air inlet according to theforward or backward movement of the piston. Therefore, in the airsuction state, the air suction amount and the air capacity of thecylinder tube can be increased. Besides, in the shooting state, the airinlet is closed by the control device so as to produce larger airpressure for pushing the bullet to the outside of the toy gun.

Prior to describing the preferred embodiment of the present invention,please refer to FIG. 2 and FIG. 3. As shown in these diagrams, an airstorage chamber 21 with various capacities can be formed in the cylindertube 2 by various movements of the piston 3 within the cylinder tube 2.Besides, an air induction passage 31 is formed on the center of thefront end of the piston 3, and a control device 7 is further applied tothe air induction passage 31 for opening or closing the air inlet 311 ofthe air induction passage 31. Besides, a tube passage 22 is formed topenetrate through the cylinder tube 2. One end of the tube passage 22 iscommunicated with the air storage chamber 21, and the other end of thetube passage 22 is connected to a bullet passage and extended to theoutside of the gun muzzle (not shown).

As shown in FIG. 2 and FIG. 3, the motions of the first preferredembodiment of the present invention are illustrated. The control device7 is for opening or closing the air inlet 311 of the air inductionpassage 31. The control device 7 is a ring-shaped movable plate 71 madeof a thin rubber plate, a thin steel plate, or a thin leaf spring. Oneend of the movable plate 71 is affixed to one side of the air inlet 311by a nail 711, and the other end of the movable plate 71 is flatly,movably leant on the air inlet 311. In the rest and shooting states, thestationary movable plate 71 is lifted up reversely by a counterforce toopen the air inlet 311 immediately after the backward movement of thepiston. At the same moment, much more outside air can be sucked into theair storage chamber 21 via the air induction passage 31 and the tubepassage 22. As a result, the air suction speed and air suction amountcan be both increased significantly for further increasing the aircapacity of the air storage chamber 21. In the shooting state, as shownin FIG. 2, if the piston 3 is released from the arc-shaped releasingedge 631 of the final gear 63 (shown in FIG. 1), the piston 3 is shiftedrapidly toward the air inlet 311 by the resilience of the restoredspring 4, which is previously compressed, whereby the air pressure isproduced to reversely force the movable plate 71 to close the air inlet311. As a result, the piston 3 is able to compress the air inside theair storage chamber 21 so as to exhaust the air via the air. passage 22for pushing the bullet to the outside by larger air pressure.

The embodying means and the achievable objects of the present inventionare disclosed adequately in the description of the first preferredembodiment. Other preferred embodiments, which are derived from thefirst preferred embodiment according to the spirit and concept of thepresent invention, are disclosed in the following description. It isadditionally mentioned that the motions of the piston and the capacitychanges of the air storage chamber of the following preferredembodiments, which are described roughly, are identical to that of thefirst preferred embodiment.

Referring further to FIG. 4 through FIG. 6, the motions of the secondpreferred embodiment of the present invention are illustrated. As showin FIG. 6, the control device 7 is a steel ball valve 72 held in theadditionally formed air induction passage 32. The air induction passage32 is a cone-shaped passage. At least a blocking pillar 721 is locatedon a larger opening of the cone-shaped air induction passage 32 forforming at least two air inlets 321 (shown in FIG. 6). The diameter ofthe steel ball valve 72 is larger than the calibers of the air inlets321 and the smaller opening of the air induction passage 32 to ensurethat the steel ball valve 72 is inseparably shiftable within the airinduction passage 32. If the piston 3 is shifted backward, as shown inFIG. 4, the stationary steel ball valve 72 is shifted forwardimmediately by the counterforce until it is blocked by the blockingpillar 721. At the same moment, much more outside air can be sucked intothe air storage chamber 21 via the air inlets 321 by the piston 3. Ifthe piston 3 is shifted forward rapidly (shown in FIG. 5), the steelball valve 72 can be shifted reversely to close the smaller opening ofthe air induction passage 32.

Referring further to FIG. 7 through FIG. 9, the motions of the thirdpreferred embodiment of the present invention are illustrated. As showin FIG. 9, a cup-shaped outer cover 731 is extended from and connectedto the front end of the piston 3. Several notches are formed on thebottom of the outer cover 731 for forming several arc-shaped air inlets331, which are communicated with an air induction passage 33, betweenthe outer cover 731 and the piston 3. The control device 7 is aring-shaped movable plate 73 made of a thin rubber plate, a thin steelplate, or a thin leaf spring, and it is affixed to light springs 732 ofthe outer cover 731 (shown in FIG. 8). The movable plate 73 has a largerdiameter so it can close the air induction passage 33. If the piston 3is shifted backward, as shown in FIG. 7, the movable plate 73 is leanton the light springs 732 immediately so as to open the air inductionpassage 33 such that the outside air can be sucked into the air storagechamber 21 via the air inlets 331. If the piston 3 is shifted forward tocompress the air inside the air storage chamber 21 (shown in FIG. 8),the movable plate 73 is shifted reversely to close the air inductionpassage 33 by using the resilience of the light springs 732.

Referring further to FIG. 10 through FIG. 12, the motions of the fourthpreferred embodiment of the present invention are illustrated. As showin FIG. 12, a funnel-shaped opening is formed on the front end of an airinduction passage 34 of the piston 3. A pivotal connection hole 342 isformed on the center of the piston 3 for pivotal connection with thecontrol device 7. At least an air inlet 341, which is communicated withthe air induction passage 34, is formed on the cone-shaped surface ofthe funnel-shaped opening. The control device 7 is a movable valve 74.Two blocks 741 and 741′ are formed on both ends of the control device 7,respectively, and connected to a cone-shaped part 742, which isconformal to the funnel-shaped opening. A spring 743 is sleeved onto avalve rod of the movable valve 74 to lean against one side of thepivotal connection hole 342. The blocks 741 and 741′ are for closing theair inlet 341 and for limiting the pivotal connection according to thelength of the valve rod.

Due to the formation of a gap between the wall of the cylinder tube 2and the block 741 in the air storage chamber 21, the backward movementof the piston 3 (shown in FIG. 10) causes the reverse movement of themovable valve 74 to compress the spring 743 for opening the air inlet341 by separating the cone-shaped part 742 from the air inlet 341. As aresult, the air can be sucked into the air storage chamber 21 from theair induction passage 34 and the air inlet 341 via the gap. If thepiston 3 is shifted forward to compress the air inside the air storagechamber 21 (shown in FIG. 11), the movable valve 74 is shifted reverselyto close the air induction passage 34 by using the resilience of thespring 743.

Referring further to FIG. 13 through FIG. 15, the motions of the fifthpreferred embodiment of the present invention are illustrated. As showin FIG. 15, the front end of the air induction passage 35 of the piston3 is semi-closed. An air inlet 351 is formed on the center of the piston3 and surrounded by several pivotal connection holes 352. Besides, thecontrol device 7 is a movable valve 75. A block 751 and several blocks751′ are formed on both ends of the control device 7, respectively, andconnected to one other by several valve rods 752 corresponding to thepivotal connection holes 352. Several springs 753 are sleeved onto therespective valve rods 752 and located between the blocks 751, 751′ andone side of the air inlet 351. The blocks 751 and 751′ are for closingthe air inlet 351 and for limiting the pivotal connection according tothe length of the valve rods 752. If the piston 3 is shifted backward(shown in FIG. 13), the movable valve 75 is shifted reversely,immediately to compress the springs 753. As a result, the air can besucked immediately into the air storage chamber 21 from the airinduction passage 35 and the air inlet 351 via the gap since a gap isformed between the wall of the cylinder tube 2 and the block 751 in theair storage chamber 21. If the piston 3 is shifted forward to compressthe air inside the air storage chamber 21 (shown in FIG. 14), themovable valve 75 is shifted reversely to close the air induction passage35 again by using the resilience of the springs 753.

Referring further to FIG. 16 through FIG. 18, the motions of the sixthpreferred embodiment of the present invention are illustrated. As showin FIG. 18, the front end of the air induction passage 36 of the piston3 is semi-closed. A connection hole 362 is formed on the center of thepiston 3 for insertion of the control device 7 and it is surrounded byat least an air inlet 361. The control device 7 is a ring-shaped movableplate 76 made of a thin rubber plate, a thin steel plate, or a thin leafspring. A rod 761 of the movable plate 76 is inserted into theconnection hole 362, and the movable plate 76 is movably, flatly placedon the front end of the air inlet 361. In the rest and shooting states,the air inlet 361 is closed by the movable plate 76, as shown in FIG.17. If the piston 3 is shifted backward (shown in FIG. 16), thestationary movable plate 76 is lifted up reversely, immediately by thecounterforce to open the air inlet 361 such that the air can be suckedinto the air storage chamber 21 from the air induction passage 36 viathe air inlet 361. If the piston 3 is shifted forward to compress theair inside the air storage chamber 21 (shown in FIG. 17), the movableplate 76 is shifted reversely by the counterforce to close the air inlet361 again.

It is additionally mentioned that the shape, size and amount of the airinduction passage and the air inlet of the piston can be adjusted so asto provide the optimum air pressure according to the practicalrequirement. However, this is not the key feature of the presentinvention and is not detailedly described herein.

1. A piston structure of a toy gun comprising: a piston having an airinduction passage and at least an air inlet; and a control device forcorrespondingly opening or closing said air inlet according to themovement of said piston, said control device being a movable plate. 2.The piston structure of the toy gun of claim 1, wherein said movableplate is a thin rubber plate.
 3. The piston structure of the toy gun ofclaim 1, wherein said movable plate is a thin steel plate.
 4. The pistonstructure of the toy gun of claim 1, wherein said movable plate is athin leaf spring.
 5. The piston structure of the toy gun of claim 1,wherein one end of said movable plate is affixed to one side of said airinlet of said piston by a nail.
 6. The piston structure of the toy gunof claim 1, wherein said movable plate is affixed to an outer coverconnected to said piston by a light spring.
 7. The piston structure ofthe toy gun of claim 1, wherein a connection hole is further formed onsaid piston.
 8. The piston structure of the toy gun of claim 1, whereina connection hole is further formed on said piston and said movableplate is inserted into said connection hole via a rod.
 9. A pistonstructure of a toy gun comprising: a piston having an air inductionpassage, at least an air inlet, and at least a pivotal connection hole;and a control device for pivotal connection with said pivotal connectionhole via a valve rod so as to correspondingly open or close said airinlet according to the movement of said piston, said control devicebeing a movable valve.
 10. The piston structure of the toy gun of claim9, wherein two blocks are mounted on both ends of said movable valve,respectively, for closing said air inlet and for limiting the pivotalconnection of said movable valve.
 11. The piston structure of the toygun of claim 9, wherein a spring is sleeved onto said valve rod of saidmovable valve.
 12. A piston structure of a toy gun comprising: a pistonhaving an air induction passage and at least an air inlet; and a controldevice for correspondingly opening or closing said air inlet accordingto the movement of said piston, said control device being a steel ballvalve.
 13. The piston structure of the toy gun of claim 12, wherein saidair induction passage of said piston is a cone-shaped passage and ablocking pillar is mounted on a larger opening of said air inductionpassage for forming at least two air inlets.
 14. The piston structure ofthe toy gun of claim 12, wherein said air induction passage of saidpiston is a cone-shaped passage, a blocking pillar is mounted on alarger opening of said air induction passage for forming at least twoair inlets, and the diameter of said steel ball valve is larger than thecalibers of said air inlets and a smaller opening of said air inductionpassage.